Submission #970443

#	Time	Username	Problem	Language	Result	Execution time	Memory
970443		Aiperiii	Nautilus (BOI19_nautilus)	C++14	100 / 100	149 ms	1116 KiB

nautilus

#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(),x.end()
using namespace std;
bitset <505*505> dp,a;
signed main(){
    ios_base::sync_with_stdio();
    cin.tie(0);cout.tie(0);
    int n,m,k;
    cin>>n>>m>>k;
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            char x;
            cin>>x;
            if(x=='.')dp[i*(m+2)+j]=a[i*(m+2)+j]=1;
        }
    }
    string s;
    cin>>s;
    for(int i=0;i<k;i++){
        if(s[i]=='W')dp=((dp>>1)&a);
        else if(s[i]=='E')dp=((dp<<1)&a);
        else if(s[i]=='S')dp=((dp<<(m+2))&a);
        else if(s[i]=='N')dp=((dp>>(m+2))&a);
        else dp=(((dp>>(m+2))|(dp<<(m+2))|(dp>>1)|(dp<<1))&a);
    }
    int res=0;
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            if(dp[i*(m+2)+j])res++;
        }
    }
    cout<<res<<"\n";
}
/*
 
3
0 9
8 1
13 7
 
*/

• Subtask 1: 29 / 29
• Subtask 2: 37 / 37
• Subtask 3: 34 / 34